/Engine/Source/Runtime/Core/Public/Misc/MapErrors.h
Sound {Actor} : Ambient sound actor has NULL AudioComponent property - please delete!: This warning is caused when there is a Ambient sound actor with a "None" AudioComponent. It is usually found in older maps where duplication was used to create a actor and can be fixed by deleting the actor causing the warning and creating a new one.
static [FLazyName](API\Runtime\Core\UObject\FLazyName) AudioComponentNull;